Sand-blast device.



A. JORN, JR. SAND BLAST DEVICE.

APPLICATION FILED MAY 12, 1911.

1,@16,415., Patented Feb. 6,1912.

J A Ta 2 x a Inventor Ad.

' by W (i Attorneys Witnesses ALBERT JORN, m, or WAUKEGAN, ILLINOIS.

SAND-BLAST DEVICE.

Specification of Letters Iatent.

Patented Feb. 6, 1912.

Application filed May 12, 1911. Serial No. 626,811.

To all whom it may concern:

Be it known that I, ALBERT JoRN, Jr., a

'citizen of the United States, residing at Waukegan, in the county of Lake and State of Illinois, have invented a new and useful Sand-Blast Device, of which the following is a specification.

This invention relates to machines for producing sand blasts, the same being of the same general type as that disclosed in Patent No. 977,453, issued to me on Decemher 6, 1910.

Where nozzles of considerable length have been employed, it has been extremely difficult to obtain an evenand constant volume of 'sand supplied to the nozzle and which is necessary in order to produce a uniform blast at all times.

One of the objects of the present inven-. tion is to provide means whereby sand may be piled close to the nozzle and said pile maintained of uniform proportions, the pile of sand being so positioned that a partial vacuum created by the passage of air into and through the nozzle, will'result in the even supply of sand to the nozzle throughout the length of said nozzle.

Another object is to provide means whereby the proportions of the sand ridge or pile may be varied so as to vary the amount of sand fed to the nozzle.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without depart ing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawin s:Figure 1 is a section through the machlne. Fig. 2 is a section on line AB Fig. 1. i

Referring to the drawing by'.characters of reference 1 designates sand chambers located at opposite sides of an air passageway,

2, said passageway extending below the chambers. Each of the sand chambers has an outlet 3 in the bottom thereof and a plate 4 extends beyond the bottom of each sand chamber and has an upturned portion 5 adapted to be engaged by an adjusting screw 6. Said screw engages an upstanding portion 7 formed upon the outer end of a controlling slide 8, said slide having an opening 9.therein adapted to register with the outlet opening 3 and being provided, at its inner end, with a thickened portion 10 constitutin a stop for a cut-off slide 11. Said cut-off s ide has an upturned portion 12 engaged by an adjusting screw 13 which also engages the upturned portion 7. Two of these slides 8 and 11 are provided under each of the sand chambers 1 and it is to be understood that said slides can be mounted, in any suitable guides provided for them.

A table 14 is arranged under each sand chamber 1 and its controlling plates 8 and 11, these tables being arranged upon and at opposite sides of the upper end of the noz zle 15. Said nozzle extends throughout the length of the air passage 2 and registers with said passage, the lower ends of the walls of the passage being beveled and converging downwardly. The inner ends of the tables 14 aline with the walls of the air passage 2 and the nozzle 15 and diverge upwardly and outwardly, as indicated at 16 so as to form inclines, the spaces between these inclines and the lower ends of the walls of the air passage 2, forming outlets through which sand is discharged into the nozzle 15.

It is to be understood that, by adjusting the cut-off slides 11 against the stops 10, escape of sand from the chambers 1 may be prevented. After these chambers have been filled with sand, the cut-off slide 11 under each chamber may be adjusted outwardly so as to open the bottom of the chamber and permit the sand to pass downwardly and pile upon the table 14 thereunder. As the opening 3 and the opening 9 extend throughout the length of the table and of the air passage 2, it will be apparent that the sand pile formed on the table will also be of the same length as the air passage 2. The position of each pile upon the table can be varied by shifting the controlling slide 8 so as to move the stop 10 inwardly or outwardly. By moving said stop outwardly relative to the machine, the inner surface of the pile will be correspondingly moved away from the incline 16 of the table, whereas, by shifting said stop 10 inwardly, the pile will be brought closer to the incline. Moreover the transverse'area of the pile can be varied by adjusting the cut-off slide 11 relative to the stop 10. After the proper adjustment of the slides has been effected, air is directed under pressure into the passage 2 and passes therefrom into nozzle 15. A partial vacuum "or suction is thus set up between the inclines 16 5 and the lower ends of the walls of passage 2 and a portion of the sand of each pile is thus drawn downwardly along the inclines 16 and into the nozzle 15. As sand is withdrawn from each pile, additional sand will gravitate downwardly so as to maintain the transverse area of the pile constantly practically uniform. As the pile extends throughout the length of the table, it will be apparent that sand will be withdrawn evenly there- 'fr'om throughout the length of the nozzle and a uniform blast will thus be produced at all times.

Although in the drawings two sand chambers have been shown it is to be understood that only one can be provided if deemed desirable.

What is claimed is p 1. In a sand blast machine, a nozzle, a table at one side of the upper portion of the nozzle, 'said table having an inclined portion, means for piling sand upon the table and ad'acent said inclined portion, and means or directing an air blast into the nozzle.

2. In a sand blast machine a nozzle, a

I table adjacent thereto and having an inclined portion, means for directing sand onto the table to formv a pile extending throughout the length of the nozzle, and

means for varying the position of the pile relative to the'nozzle.

3. A sand blast machine including a nozzle, a table having an inclined portion fordirecting sand into the nozzle, a sand con- 40 tainer, and means for directing sand from the container to the table to pile the sand in a predetermined position on the table.

4. A sand blast machine including a nozzle, a table having an inclined portion for directing sand into the nozzle, a sand container having an outlet above the table, means for opening and closing the outlet,

and means adjacent the outlet for directing sand onto the table at a predetermined distance from the inclined portion thereof, and 60 means for directing, an air blast past the table and into the nozzle. 7

5. A sand blast machine including a nozzle, a table having an inclined portion for directing sand into the nozzle, said table extending throughout the length of the nozzle, a sand contalner having an outlet above the table, a valve for controlling the passage of sand from the container, and adjustable means. shiftable relative to the outlet for directing sand upon the table at a predetermined distance from the inclined portion to form a pile extending throughout the length of the nozzle, and-an air passage alinin with the nozzle and extending above the ta 1e, there being a space between said passage'and the inclined portion of the table.

6. A sand blast machine includin an air passage, a table at one side thereo means for directing an air blast past the table and into the passage, a sand container having an outlet, and means for shifting the outlet relative to the table, the contents of thereceptacle being adapted to gravitate through the outlet and to pile upon the table.

7. A sand blast machine including an air passage, a table at one side thereof, means for directing an air blast past the table and into the passage, a sand container having an outlet, means for shifting the outlet relative to the table, the contents of the receptacle being adapted'to gravitate through the outlet and to pile upon the table, and means for varying the size of the outlet opening to increase or diminish the transverse area of the pile upon the table.

In testimony that I claim the foregoing as my own, I have hereto ailixed my signaturein the presence of. two witnesses.

ALBERT J ORN, J n.

Witnesses.

IDA E. JoRN, JoHN KELLY. 

